About PACE

PACE is a civil engineering firm offering advanced water resource services by applying knowledge, creativity and innovative design approaches to develop aesthetic, environmentally sustainable and practical engineering solutions. A strong foundation of knowledge in the principles of water chemistry, water biology, hydrology and hydraulics is applied to our unique engineering approach to:

• Treat ALL forms of water as assets • Emulate the natural forms of waters • Blend engineering need with aesthetic and environmental value • Introduce natural ecosystems • Add overall enhanced value to a project

Specific service areas include: • Potable Water Storage and Distribution • Water and Wastewater Treatment • Stormwater Management • River Engineering • Floodplain Mapping • Watershed Analysis / Planning • GIS Water Resource Applications • Water Quality Assessment • Lake Systems / Water Features / Pools

PACE Approach Combining advanced water resource expertise with nature to provide better engineering solutions. Naturalized Flood Control Solutions

Traditional earthen channel.

PACE alternate inspired by natural meandering creeks placed adjacent to trail system providing flood protection and community amenity.

IN PARTNERSHIP WITH NATURE Revolutionizing Water Recycling

Traditional Wastewater PACE Water Reclamation Facility Treatment Plant

PACE’s approach is to recycle water for beneficial reuse with a unique design that is:

• On a very small land footprint

• In aesthetically pleasing and odor controlled facilities • Simple and cost effective to operate

PACE Plant Footprint Multi-Purpose Flood Control Solutions

Sedimentation basins can consume large areas of land with an undesirable appearance.

This PACE designed sedimentation basin features a signature entry lake with a soil cement liner to accommodate dredging equipment to remove deposited debris. Energy Dissipation and Sediment Basin

IN PARTNERSHIP WITH NATURE Creative Flood Control Solutions

Traditional concrete weir spillway.

Natural form approach to spillway with visually pleasing appearance in wet or dry conditions. A comprehensive range of water resource engineering services centered in stormwater management, water/wastewater and recreational water. Advanced Services A comprehensive range of water resource engineering services centered in stormwater management, water/wastewater and recreational water. water treatment & infrastructure

Pure and reliable potable water is vital to any development’s success. PACE provides a unique hands-on background and insight into planning, consulting, design, and implementation of potable water solutions. As part of the planning process, PACE develops integrated water balances for sustainable water use and conservation including water recycling. Also included in the planning phases are selection of appropriate water sources, conveyance, and distribution. Once the source has been selected, PACE has an extensive background in water treatment including the removal of trace constituents such as iron, manganese, arsenic, and uranium, as well as salinity reduction through desalination. Treated water must be properly stored and transmitted to customers during average, peak, and fire demand periods, and PACE has engineered dozens of different types of water storage tanks, booster pump stations, and control systems to deliver water at a constant, ideal pressure. Finally, because of PACE’s extensive construction, operations, and controls experience, we are able to troubleshoot, startup, and train staff on the operation of PACE-engineered systems.

Service Offerings: • Water Planning and Sustainable Supply Analysis • Brackish and Seawater Desalination Design • Water System Modeling Distribution System Design • Trace Contaminant Removal Design • Well-Head Investigation and Design • Water Storage Tank Design • Surface Water Intake and Pump Station Design • Booster Pump Station Design • Conventional Water Treatment Design wastewater treatment & infrastructure

After potable water is used by the customer and converted to wastewater, it is conveyed to a treatment facility to remove pollutants, excessive nutrients, and pathogens. PACE has extensive experience in properly planning for wastewater collection and conveyance, including selection of gravity, low-pressure, and central pump station options. PACE has the ability to design conveyance solutions that are valuable and reliable by properly handling debris in the wastewater and power outages. We have repeatedly provided treatment facility solutions that are innovative, cost-effective, straightforward to construct, and simple to operate. The water exiting PACE-designed wastewater reclamation facilities is clean and safe for water applications including storage reservoirs, advanced irrigation treatment systems, cooling tower filtration systems, and pump stations for recycled water application, as well as recharge and injection systems to store recycled water underground. PACE also provides permitting for discharge of reclaimed water to surface waters.

Service Offerings: • Wastewater Planning and Collection Analysis • Tertiary Treatment Systems for Reuse/Recharge • Wastewater System Modeling • Recycled Water Storage and Pumping Systems • Lift and Pump Station Design • Recharge Wells and Basins • Wastewater Reclamation Treatment Design • Permitting for Recycled Water wetland design & restoration

PACE’s ability to restore or create successful wetland systems relies on the understanding of the operation of hydraulic systems and processes in nature, as well as the ability to assess, recreate, and manipulate hydrology. Standard “cookbook” approaches have limited values and success depends on the combined expertise, which integrates hydrology and biology with a strong engineering technical foundation. PACE’s philosophy for the design of these systems is that they should be “self-sustaining” features of the landscape and integral parts of an ecosystem.

Preliminary Planning Baseline Inventory • Topographic Hydrologic • Scoping and Approach • Topographic and Hydrology Survey • Soil and Substrate Design • Defining Goals and Objectives • Soil Survey • Restoration Design • Plant Survey • Habitat Features • Fish and Wildlife Survey • Maintenance Elements • Baseline Report flood control

PACE offers a solid background in stormwater and floodplain management disciplines, including hydrology, hydraulics, sediment transport, river engineering, water quality assessment and modeling, stormwater treatment facilities, hydrologic mitigation and computer modeling. Among the unique strengths of PACE is its many water resource specialists dedicated to watershed restoration and stormwater management, with state-of-the-art hydraulic and hydrologic analyses capabilities. Our specialists are recognized as leading experts in the field, providing consultation to many public works and water resource agencies, as well as featured speakers at many technical conferences in the field.

Specific flood control service areas include:

• Flood Control Channel/Facility Design • Levee System Design • Regional Flood Protection Management • Flood Hazard / Floodplain Mapping • Complex Hydraulic Analysis Control Channels • Floodplain Management • Specialized Hydraulic Structures Design/Analysis • Facility Phasing / Implementation Program • Flood Control Operation / Maintenance Requirements • Flood Control Facility Cost / Benefit Analysis • Regional Flood Control Masterplanning / Alternatives Analysis watershed management & planning

Watershed management & planning is critical to sustainable development. PACE has over 20 years experience in large -scale watershed management which includes planning level analyses that provide a basis for future development and surface water infrastructure design. The goal of watershed planning is to develop backbone surface water drainage and treatment facilities that protect from erosion and flooding hazards, improve water quality, preserve and protect native habitat, and provide a basis for long-term sustainable development. Our skilled GIS department has the ability to analyze and manipulate data for large watersheds and present effective and concise exhibits, which become critical planning tools for new projects within the watershed.

Watershed Management Services Include:

• Detailed Watershed Mapping • Hydrology Mitigation • Hydrology Studies • Erosion / Sediment Control • Watershed / Stream Corridor Planning • Wetland Habitat Identification and • Urban Drainage Master Plans Mapping • Water Quality Assessment • Surface Water Infrastructure Planning lake restoration

PACE provides engineering services to evaluate existing lake infrastructure and/or operations including: • Mechanical Equipment Function and Efficiency • Lake Shoreline Condition • Existing Conditions Surrounding the Lake • Containment and Lining System Effectiveness • Water Quality Systems for the Lakes • Water Usage and Makeup Water Delivery System • Operations and Maintenance Program

The intent of our service offerings is to develop a balanced, natural ecosystem structure that promotes positive water quality and minimizes operations and maintenance requirements. Our recommendations identify the issues related to the water quality of the lake including algae, trash accumulation, stagnation, aesthetics, odors, and fish kills, and provides a design that reduces or eliminates the problems.

PACE prepares plans and reports that address the issues for the lake and offers detailed design plans for shoreline treatment, lining system, liner sealing details, makeup water level control, water quality management systems, and mechanical plans for construction. manmade lakes

PACE has experience with the design and construction of over 1,000 manmade lake systems. The design team works closely with clients throughout the project development process, starting with planning that takes into account the function and aesthetics of the lake within the ecosystem of the community. Combining a wide variety of engineering disciplines, our engineers develop a water feature that serves the builder, the community and the environment.

As part of the lake design, PACE applies innovation and creativity to focus on: • Land Planning Integration (maximizing water views and increasing land values) • Stormwater Infrastructure Integration • Lake Design • Lake Water Quality Management • Fish and Wildlife Habitat • Lake Construction • Lake Operations and Maintenance • Environmental Impact Evaluation and Permitting water features

For over 20 years, PACE has time and again successfully combined the inherent beauty of water with responsible design to create water features that are as breathtaking as they are functional.

PACE is experienced in water feature design for residential, golf course, parks and commercial projects, and has considerable experience with resorts, hotels, and condominiums.

Services available include: • Water Feature Engineering • Water Treatment for Water Features • Water Feature Layout and Concept Development • Water Chemistry Control • Interactive Water Feature Instrumentation and • Water Feature Modeling and Animation Controls • Manmade Rock Design • Water Feature Pump Stations • Recirculation System Design pools/spas/swim lagoons

The attraction people have to water is illustrated with a sense of adventure in our pool features –cascades, rock work and non-traditional shaping. From the latest trend in saltwater pools, to traditional community and resort, pools and spas add value to your project with a pool that is anything but ordinary.

Services available include: • Pool/ spa/ swim lagoon concept development & • Recirculation system design engineering • Utility coordination (water, sewer, power) • Manmade rock design • Health code coordination

• Water treatment for pool/ spa/ swim lagoon • Permitting • Water chemistry control (filter, heater, oxidizer, sanitizer, pH control) water play areas/ interactive water features

Add interest and excitement to your project with interactive water features that tickle the imagination and set the heart racing. Slides, flumes, falls, streams, wave pools, exotic water playgrounds- they all increase entertainment value for your guests and make your destination the one that’s worth another visit.

Services available include: • Water play areas/ interactive water feature concept • Water chemistry control (filter, heater, oxidizer, sanitizer, development & engineering pH control) • Water toys • Recirculation system design • Lazy rivers • Utility coordination (water, sewer, power) • Water towers • Health code coordination • Water slide • Permitting • Wave pool, surf pool, wave riders • Physical hydraulic modeling

Advanced Experience Our experience combines advanced technical understanding with value-added solutions in terms of cost, aesthetics and function. Mountain House Community Water and Sewer Infrastructure Mountain House (near Tracy), California

Trimark Communities, LLC, a subsidiary of Sunchase Holdings in Phoenix, AZ, developed a rural area on the border of the Alameda County / San Joaquin County, about 60 miles east of San Francisco. Here, Trimark has created a development known as Mountain House, a self-contained, 4,784-acre master planned community that is home to 43,500 residents. Incorporated into this new town is an innovative, natural approach to water resources management. PACE led the engineering efforts on all of the project's water resource issues, including potable and non- potable water distribution systems, a water reclamation facility development-wide stormwater management planning and creek restoration design services for Mountain House Creek, one of the development's signature features.

Advanced Elements: Creek Restoration: • Conversion of creek from an agricultural ditch into a naturalized creek flowing within a biotic, multipurpose corridor. • The creek eliminated numerous large storm drain pipes, several large, dry extended detention-basins BMPs, and greatly reduced the cost of stormwater infrastructure without compromising safety and treatment. • Tremendous energy savings through the use of • The potable water system includes two 3.7 million • Using five precast concrete bridges, disturbance to the micro-fine bubble diffuser panels in the SBRs and the gallon partially submerged concrete storage tanks restored riparian zone was prevented, permitting issues were use of low-energy Flygt “banana blade” mixers. with two zone domestic and fire pumping station avoided and construction time was reduced. (max 3,000 gpm domestic plus 3,500 gpm fire) within Water Distribution System the same structure. The 150 foot diameter, 31 foot Water Reclamation Facility: • The irrigation system consists of 2,500 gpm on- tall tanks were constructed partially underground • Sludge Processing to Meet EPA Class B Biosolids demand constant high pressure pump station design to reduce the aesthetic impacts to the adjacent Requirements. including a canal check dam, 1/8 inch stainless steel community college and residential development. • Treatment takes place in underground tanks, significantly wire screen intake system, and hydropneumatic tank • PACE designed two separate sets of potable water reducing land requirements and improving the facility's and pump station building which houses pumps, booster pumps in an architecturally pleasing pump aesthetics. filters, and electrical and associated piping and house structure and a pressure reducing / sustaining • A unique structural concrete deck design reduced construction instrumentation. valving and metering station. time and cost. • The irrigation station also has a set of primary intake • The pump station has redundant pumps, automatically • The original 0.45 MGD facility resided on 21 acres of land, screens and 100 micron filter discharge filtration transferred back-up power, disinfection injection and while the new 3 MGD per day facility resides on only one acre system, which strain debris from the canal water and monitoring, and full remote telemetry and security of land. prevent zebra mussels from clogging equipment. systems with full-motion video surveillance.

Mountain House Creek Restoration Tracy, California

Project of the Year American Public Works Association (APWA)

Mountain House Creek was all but destroyed by decades of agricultural use and had become no more than an irrigation conveyance system. When the land was to be converted from agricultural use to a new residential town, PACE developed an innovative approach to flood control and stormwater management for the site that also restored the natural creek system in the process. The creek was restored to its natural form by including a meandering shape, deep and shallow zones, and wet and dry zones, thereby making the creek a wildlife congregation area that serves as a passage area and food source for dozens of species. These natural forms also serve stormwater management benefits, offering stormwater retention, water quality treatment and conveyance through the project site.

Advanced Elements: • Conversion of creek from an agricultural ditch into a naturalized creek flowing within a biotic, multipurpose corridor. • The creek eliminated numerous large storm drain pipes, several large, dry extended detention-basins BMPs, and greatly reduced the cost of stormwater infrastructure without compromising safety and treatment. • Using five precast concrete bridges, disturbance to the restored riparian zone was prevented, permitting issues were avoided and construction time was reduced. • Innovative approach to flood control and stormwater management that focused on recreating the geomorphology of a natural creek system.

Mountain House Water Reclamation Facility Tracy, California

Global Water Intelligence Wastewater Plant of the Year Commendation

PACE provided engineering, permitting and start-up services for New State-of-the-Art a new, state-of-the-art 3 MGD per day water reclamation facility. 3.0 MGD WRF Replaces The new facility utilizes a two-tank SBR process for biological Existing Facility oxidation of organics and secondary clarification. Tertiary (1 Acre) treatment is accomplished through the SBR, Aquadisk cloth media filtration, and advanced UV disinfection. The Mountain House WRF is among the first facilities in the United States to utilize a UV Disinfection System certified under NWRI to meet California Title 22 requirements.

Advanced Elements: • Sludge Processing to Meet EPA Class B Biosolids Requirements. Former .45 MGD • Treatment takes place in underground tanks, significantly Facility Boundary reducing land requirements and improving the facility's (22 Acres) aesthetics. • A unique structural concrete deck design reduced construction time and cost. • The original facility resided on 21 acres of land, while the new 3 MGD per day facility resides on only one acre of land. • In 2006, the Mountain House WRF was recognized by Global Water Intelligence as a Water / Wastewater Project of the Year. • Mountain House realized tremendous energy savings through the use of micro-fine bubble diffuser panels in the SBRs and the use of low-energy Flygt “banana blade” mixers. This project represents the first application of these types of diffuser panels in a US SBR facility.

Mountain House Potable Water Storage and Booster Pump Station Tracy, California

PACE provided the design and construction administration services for a new multi-zone potable water storage and booster pumping facility for the Mountain House Community Services District. The design included two separate sets of potable water booster pumps in an architecturally pleasing pump house structure, a pressure reducing / sustaining valving and metering station, and two twin 3.7 million gallon DYK pre-stressed water storage tanks. The 150’ diameter, 31’ tall tanks were constructed partially underground to reduce the aesthetic impacts to the adjacent community college and residential development. The booster pump station consisted of twin 3,500 gpm pumping systems which provide drinking water and fire protection to approximately 8,500 homes and associated commercial and educational development. The station has redundant pumps, automatically transferred back-up power, disinfection injection and monitoring, and full remote telemetry and security systems with full-motion video surveillance. PACE also provided the engineering permitting effort for municipality and County submittals and reviewed the contents of water balances performed for the municipality. Concurrently, PACE also provided the same services for the design of an additional remote pumping station on the west side of the project with a firm capacity of 5,500 gpm.

Advanced Elements: • Twin 3.7 Million Gallon partially submerged concrete storage tanks • 7,300 GPM dual-zone potable water booster pump station • Integrated pressure reducing station • Chlorine residual monitoring and injection facilities • Remote radio SCADA and PLC controls. • Two zone domestic and fire pumping station (max 3000 gpm domestic plus 3500 gpm fire) Tank Pre-Stressing Dateland Inland Desalination Water Treatment Plant Yuma, Arizona

PACE is providing Dateland Public Service Co. with inland- desalination alternatives, engineering design, environmental permitting, and grant funding application services to improve and expand their existing groundwater Reverse Osmosis (RO) treatment system. The groundwater in the Dateland basin contains several trace contaminants including arsenic and fluoride. The groundwater also contains irrigation inhibitors boron, chloride, and sodium, and overall contains high levels of TDS. The contaminants must be removed to comply with primary and secondary drinking water standards. PACE investigated several process modifications and alternatives using Performance Based Specifications to deliver a cost effective, flexible and fundable project using an advanced RO process. The upgrade and expansion allows for the reuse of existing infrastructure, but with significantly higher permeate recovery than the existing RO system. It also produces more “wet” water from the existing supply, reducing waste and improving efficiency. In addition to the mechanical process work, PACE is also providing a preliminary alternative energy evaluation for the use of PV solar systems to power the expanded plant. The Dateland Water Plant Expansion is federally funded by USDA, Rural Development and Water Infrastructure Finance Authority.

Advanced Elements: · Investigation of several process modifications and alternatives using performance-based specifications to ensure Utility’s objectives were met and federal funds were secured. · Upgrade reverse osmosis system to innovative high recovery process to reduce waste and improve plant efficiency. · Alternative energy design for use of photovoltaic solar systems to further provide energy efficiency and lower capital cost. Filter Skid - 3D View

PV Solar Power Generation System Walnut Canyon Reservoir and Water Treatment Plant Operations Improvement Anaheim, California

PACE was contracted by the City of Anaheim to study and recommend optimal operation of the Walnut Canyon Reservoir, a large 920-million gallon raw water reservoir, and the Lenain Water Treatment Plant. The reservoir is used as a feed source for one of the City’s water treatment plants. Specifically, PACE performed monthly field water quality monitoring and water sampling for dissolved constituents, collected water and sediment samples and measured water and sediment oxygen demands, and constructed a water quality model and databases useful in identifying the reservoir water quality characteristics, such as macronutrients (i.e., nitrogens and phosphorus), iron and manganese release, sulfate reduction, and dissolved oxygen depletion. In addition, PACE conducted rigorous water quality studies including water chemistry analysis, algae counts and identification, and bench-scale water treatment tests during periodic taste and odor events occurred in 2010 and provided the City a series of expert consultation and recommendations on their reservoir and water treatment plant operations.

PACE also developed concepts to improve the current conditions at Walnut Canyon Reservoir including: • Prevention of foul odor releases during lake turnovers in fall Advanced Elements: and winter months • Detailed water chemistry analysis for spatial-temporal manganese removal below their secondary MCL or • Various treatment alternatives for taste and odor compounds, lake water quality monitoring reported odor threthold (both <0.05 mg/L), while including algal metabolites (geosmin and 2-MIB) and • Chemical and biological analyses for taste and odor minimizing the formation of bromate, a potentially hydrogen sulfide, generated within the reservoir management carcinogenic disinfection by-product of ozonation • Alternative lake aeration scenarios to prevent stratification and • Algae quantification and identification (<0.01 mg/L). to minimize the bottom dead zones during summer months • Macro and micronutrient • Dilution of bottom water with the reservoir inlet water • Best management of zebra and quagga mussels proliferation • Destruction of odorous hydrogen sulfide (H2S) without to have appropriate sulfide concentration for ozone in the reservoir, especially within the water intake structure purchasing additional chemicals or equipment, but treatment. using an exisiting ozonation facility in the Lenain Water • Water and sediment core analysis for oxygen demand Treatment Plant calculations • A bench-scale study was conducted to determine an • DYRESM-CAEDYM hydrodynamic model for reservoir optimal ozone-sulfide ratio to achieve sulfide and water quality Colorado River Intake To Walnut Canyon Reservoir Ozonation Treatment Bench Testing Performed At Pace In-House Laboratory Puerto Peñasco Water Desalination Facility Puerto Peñasco, Mexico

PACE provided the Municipality of Puerto Peñasco in Rocky Point, Mexico with a design for a desalination facility to improve the sustainability and quality of potable water for their residents and large tourism industry. The first phase of the project will provide 10.5 MGD per day of potable water from desalination to provide for existing demands. Future phases include quadrupling of this capacity potentially including long-term transmission of treated water to the United States.

Advanced Elements: • Marine wildlife protection and beach sand filtration using subsurface sea floor intakes. • Natural disaster damage-resistant and corrosion resistant beach pumping station with submersible equipment. • Efficient treatment design with recycling of both pretreatment and second pass rejects. • Pretreated water storage to desalinate during degraded sea water quality. • Integrated “tank within a tank” post treatment remineralization and disinfection. • Achieves excellent water quality for multiple uses including irrigation, such as boron, chloride, and sodium removal to low levels. Puerto Penasco Water Desalination Process Schematic Above View of Intake Structure 1000’ Feet Island. Submersible Pump Station on Right and Electrical on Left

Within Dry Pit Submersible Pump Station Infront of control & Operations Building with Brine Water Fountain West Point a La Hache Water Diversion Pumping System New Orleans, Lousiana

PACE is working with the Louisiana Office of Coastal Protection and Restoration (OCPR) to improve an existing siphon system already in place which will be capable of pumping 2,300 cfs. The West Pointe a La Hache Siphon, located in Plaquemines Parish was constructed in 1990 in response to the alarming rate of decline in the marshes found in the Louisiana delta region. When the area was in its natural state, the Mississippi River would repeatedly overflow and change course, depositing its large supply of sediment along the coast and creating southern Louisiana. Due to the build-up of levees along the Mississippi River, flooding of the surrounding wetlands is no longer a regular occurrence because engineering efforts have prevented the river from changing course. The system in place at West Pointe a La Hache returns a supply of fresh water and river sediment to the marshes which could reverse the decline of the marshes. PACE is creating a permanent on-site vacuum priming system that is capable of priming all eight tubes simultaneously or individually, replacing the on-site vacuum storage tank with a more robust and simplified system, installing an on-site control building to house siphon mechanical equipment and associated equipment to protect from weather elements and vandalism, extending the siphon intake pipes to increase sediment transport and decrease the frequency that the tubes lose prime, and provide attachments to one or more intake pipes to be coupled with dredging operations in order to increase sediment intake.

Advanced Elements:

• Self Regulating Vacuum Priming System to both initially prime the siphon in less than 10 hours, and also maintain optimal siphon conditions for transfer of maximum flow • System adjusts for changes in tide conditions upstream and downstream • Siphon shuts down if system conditions are not optimal, such as reverse flow or bad water quality • Mechanical equipment is enclosed in raised cast in place concrete building above flood conditions Siphon Break Sequence Santa Paula Water Recycling Facility Santa Paula, California

Components: • Membrane Bio Reactor facility • Initial Capacity of 3.4 MGD, with ability to expand up to 4.2 MGD • Three percolations basins • Largest Koch MBR facility in US

The existing City of Santa Paula Wastewater Treatment Plant was constructed in 1939 and most of the facilities have reached the end of their useful service life and are non-compliant with current regulatory requirements. The existing facility has a capacity of 2.55 MGD which is insufficient to meet future growth demands of the City and therefore additional capacity is required. The City is planning to replace the existing facility with a new Water Recycling Facility (WRF) and percolation system to be constructed on approximately 53 acres immediately south of the existing facility. PACE was contracted as part of the design-build-operate-finance (DBOF) team to provide engineering for the new WRF, which will be designed as a Membrane Bio Reactor (MBR) with an initial capacity of 3.4 MGD and readily expandable to 4.2 MGD to meet wastewater flow projections for the year 2025. Also included in the new WRF design are three percolation basins with a combined surface area of about 15 acres located to the west of the WRF site. The Santa Paula WWTP will be the largest Koch MBR facility in the United States upon completion. The WWTP is also the first DBOF municipal WWTP in California.

High-Speed Turbine Blowers - Main Membrane Separation Tanks Aeration & Membrane Scour

Solids Dewatering Screwpress UV Disinfection Somerton Wastewater Treatment Plant Phase III Expansion Somerton, Arizona

PACE is currently providing design services for the City of Somerton’s wastewater treatment facility expansion from 0.8 MGD to 1.6 MGD. The existing plant is a 0.8 MGD biological aeration process plant using SBR technology. PACE value engineered the original plan which called for 0.4 MGD expansion at a $6.2 million budget. PACE modified the original plan to utilize the 4-stage Continuous Flow Biological Nutrient Removal (BNR) Process and will be designed to have a flow capacity of 1.8 MGD when completed for the same budget, producing the following benefits: an additional 1.0 MGD of capacity instead of 0.4 MGD, creating 1.0 MGD at under $7/gallon versus the original 0.4 MGD at over $15/gallon, and reduced land use by conversion of the facility’s process and using existing tankage instead of duplicating and constructing four new SBR tanks. The effluent will meet ADEQ Class B standards.

Santa Margarita Water District Recycled Water Systems Mission Viejo, California

Santa Margarita Water District in Orange County has one of the largest recycled water systems in the Country when considering the large distribution system flow, seasonal storage, and land mass that the infrastructure covers. PACE has been extensively involved in the design and operation of the systems including 1) a dry-weather flow retention, pumping, and filtration system, 2) an ozone oxidation system for treatment of reduced sulfur gases, 3) a bottom water oxygenation and pumping system for the storage reservoir, and 4) miscellaneous control and monitoring of the system to provide optimal operation.

Advanced Elements: • Rare system in CA in which reclaimed dry weather nuisance and flood water are pumped through the facility and reuses the water for irrigation • High efficiency, low maintenance because of the non-clogging pumping technology • 4,000 gpm pumping plant and filtration equipment for dry weather flow • Converted existing aeration system into temporary ozone oxidation system for mitigation of reduced sulfur gases in the Before water quality enhancements After oxidation enhancements and other measures recycled water system and during odorous condition recommended by PACE were implemented • Designed 2,000 lb/day oxygenation system for the bottom waters of the storage reservoir to handle dissolved ammonia and other oxygen demands • Performed testing on water and reservoir sediments and provided computer model of the water quality under various seasonal changes TO WETLANDS TALBERT LAKE AIR SUPPLY/EXHAUST & TOP OF LEVEE PRESSURE SENSING LINE VALVE ACTUATOR

INCLINED STEEL GRATE/TRASH RACK WEIR CREST COMPRESSOR AIR DAM ELEVATE ELEVATE TO RUBBER DAM ABOVE INVERT

SPACER

TOP OF CONCRETE SILL AT NORMAL CHANNEL INVERT INTERCEPTION ISOLATION VALVE ELEVATION ADDITIONAL SECONDARY SEDIMENT RCP CONNECTOR PIPE TO PUMP STATION 2 X 25 HP SUMBERSIBLE STILLING BASIN IN-CHANNEL STORAGE/REMOVAL FOREBAY (4 MGD CAPACITY) NON-CLOG PUMPS

Oso Creek Dry Weather Flow Diversion System Speece Cone Oxygenation System Installation City of Huntington Beach Stormwater Diversion and Wetland Treatment System Huntington Beach, California

Using a combination of engineered wetlands and the restored Talbert Lake, this project provides urban dry-weather runoff treatment for a 22 square mile municipal watershed. This system involves the diversion of nuisance flows from a regional flood control channel to the wetlands area, a series of interconnected wetland treatment cells and manmade lake polishing systems. By recreating a natural biological process, this project develops a managed ecosystem that provides water quality treatment.

Advanced Elements: • In-channel flow interception facility capable of capturing dry- weather flows but not interfering with the flood control channel hydraulic capacity. • Underground diversion pump station which is integrated into flood control channel maintenance roadway. • Utilizes the existing municipal storm drain system to deliver flows to the park and minimizes force main construction. • Specialized interconnected naturalized treatment cells consisting of alternating shallow wetlands and wetland ponds. • Wetlands include specialized surface and subsurface wetland treatment elements utilizing specialized media for the growth of treatment bacterial biofilters. • Naturalized treatment system design within the park designed so that existing active park areas are not lost, and aesthetics and passive recreation are enhanced. • Restoration of an existing ephemeral lake within the park provides year round water storage and final polishing treatment with submerged media biofilters, submerged aeration, and wetland planters system. • Restored lake serving as irrigation storage for park, eliminating potable water use for irrigation. Talbert Lake and Wetland Restoration Conceptual Design EAST GARDEN GROVE WINTERSBURG CHANNEL (EGGWC) DIVERSION CONCEPT

AIR SUPPLY/EXHAUST & PRESSURE SENSING TO WETLANDS & TALBERT LAKE

TOP OF LEVEE AIR DAM ELEVATED AIR DAM INVERTABOVE

AIR DAM COMPRESSOR

SPACER NORMAL CHANNEL INVERT ELEVATION

STILLING BASIN IN-CHANNEL RCP CONNECTOR PIPE 2 x 25 HP SUMBERSIBLE TO PUMP STATION FOREBAY NON-CLOG PUMPS ADDITIONAL SECONDARY SEDIMENT REMOVAL IN CDS UNIT Before

After Wetlands of Avondale Drainwater Treatment and Groundwater Recharge Avondale, Arizona

Environmental Excellence Award Valley Forward Association

PACE provided services for planning, design and construction of a unique surface water treatment system using a series of wetlands lagoons. The wetlands treats up to 13.2 MGD per day of irrigation water to drinking water standards for groundwater recharge through a spectacular series of interactive lagoons. The 83 acre lagoon system not only provides water treatment, but also creates a park- like setting and waterfront view home site for an 800-home mixed- use subdivision.

Advanced Elements: • Water treatment is accomplished by steady flow through a series of 16 stepped wetland lagoons. • Approximately 30 acres of islands, planted with effective wetland plants, create a visual amenity, wildlife habitat, and a cool system of lagoon inlets and outlets, weir control boxes, hydraulic piping and valves, and water flow and water quality monitoring. • The wetland design and functionality was presented at numerous state and national conferences, and the project received an Environmental Excellence Award from the Valley Forward Association for Environmental Technologies in the Public Sector. • Treatment system has successfully processed and recharged over 10.5 billion gallons of canal water contaminated with agricultural runoff to comply with drinking water standards for groundwater recharge since August 1999, when it became fully operational.

Original concept added no value to site and had limited water treatment benefit

PACE concept provided treatment in 30 acres of wetland islands and creates premium land value with water front property.

Lake Elsinore Lake Restoration Lake Elsinore, California

PACE engineered a mechanical aeration system to improve water quality across this 3,000 acre natural lake system. The aeration system is designed to draw water from the bottom of the lake to the surface to allow wind and air to oxygenate the entire water column within the lake. The compressed air also provides direct oxygen transfer. Oxygenating the water provides enhanced precipitation and removal of phosphorous and other nutrients which cause algae blooms.

Advanced Elements: • Prevents fish kills and improves water quality for more healthy aquatic ecosystem. • Six sets of 2 mile perforated submerged pipelines in fanned distribution network laid out maximize area of impact. • Two modes of operation including normal mixing and “boost” for extreme conditions and minimize power costs. • Reduction in sound levels to ambient conditions at compressor stations. • Sophisticated control strategy to anticipate degrading water quality and activate compressors accordingly to regulate temperature between different layers of the water column and specific dissolved oxygen concentrations. • Two automated, wireless networked, and self-cleaning water quality profiling buoys.

Tejon Lake Water Quality Enhancement Program Lebec, California

PACE identified and engineered water quality improvement and management techniques to ensure the lake is in pristine condition for recreation and habitat support for the Tejon Ranch community. A monitoring and water quality management program were established to identify baseline lake properties vital to future lake use, and a maintenance program was established with the objective of meeting water level and water quality parameters suitable for wildlife to thrive and to support human recreation activities. As part of the management program, a mechanical aeration system was designed for the lake to provide mixing and enhancement of dissolved oxygen concentrations to improve water conditions for fish and reduce algal bloom within the lake.

Advanced Elements: • The lake monitoring program includes GIS mapping and elevation profiling, continuous temperature and dissolved oxygen monitoring, lake chemistry, sediment chemistry, lake biology, toxins to fish and human consumption, survey of in flowing streams for general biology and suitability for the addition of riparian or other wetlands for biota/water purification. • Aeration system includes 19 pods offset 300 ft apart from one another to optimally balance the systems influence reach with the appropriate amount of water mixing from the system. • Developed water replacement strategies to mitigate from significant water level changes, especially during years of low precipitation that traditionally cause the lake to occasionally dry out completely. • Water quality maintenance program with the objective to sustain large game fish populations, reduce the risk of eutrophication caused by algae blooms by removing nutrients, and maintaining a healthy, consistent water level.

Dissolved Oxygen Levels With and Without Aeration

Santa Clara River Soil Cement Bank Protection Valencia, California

Award for Technical Excellence American Society of Civil Engineering

Innovative river management techniques were applied to the Santa Clara River avoiding encroachment into the natural river function while protecting surrounding areas from damage from riverbank erosion and flooding. PACE facilitated the groundbreaking use of soil cement as a means of flood control within Los Angeles County along the Santa Clara River. To date, PACE has planned, designed, and managed construction of 6 miles (250,000 cy) of soil cement bank protection and currently is in the design phase for another 7 miles.

Advanced Elements: • Use of native material (~90%) provides environmentally sensitive erosion protection solution. • Cross-section geometry minimizes encroachment into active streambed. • Low long-term maintenance requirements due to sections not impacted by severe flooding and erosion resistant properties. • Improved public safety with easy access in and out of the river corridor in the event of an emergency. • Project time and schedule savings. • Construction cost savings of 30-50% over conventional bank protection methods.

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River

Soil Cement River Excavation for Soil Cement

Backfill

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River River Buried Soil Cement

Buried Soil Cement

1) Excavation 2) Soil Cement Placement 3) Backfill Completed Over Soil Cement 4) Revegetation & Trail Over Soil Cement PLAN VIEW Bridgeport Lake Integrated Stormwater Management System Valencia, California

Excellence in Stormwater Management California State Water Resources Control Board Water Quality Award

Bridgeport Lake is a 15-acre manmade lake providing both a visual and natural resource amenity to the adjacent Bridgeport development. With a tributary drainage area of 75 acres, Bridgeport Lake provides several urban storm water pollution treatment and water quality maintenance features that serve to fulfill stormwater detention and treatment requirements for the Bridgeport development. In addition to being the focal aesthetic feature of this high-end development, the lake system also serves as the primary drainage facility for the site and as a water quality and urban storm runoff enhancement facility.

Advanced Elements: • Bridgeport Lake provides retention for 3 inch over its entire surface area or 1.3 acre, which is more than enough capacity to retain the first flush of a storm event. • Water quality filters collect initial runoff and retain it long enough for the majority of pollutants to be removed. • Eliminated the need for several large diameter storm drain pipes by routing storm and urban runoff through the lake system. WATER SOURCE • Lake water quality enhancers include biofilters, aeration, and wetland planters. STORM & NUISANCE • Created premium land values surrounding lake. RUNOFF • Created habitat for various local wildlife species and D environmental amenity for the local community. OVERFLOW

BIOFILTER AERATION WETLAND

Biofilter Section

Water Quality Cross Section Water Quality in Bridgeport Lake Lake Forest II Sun & Sail Club Swimming Complex Cogeneration System Lake Forest, California

Lake Forest II Master Homeowner’s Association, located in Orange County, CA, has several pools and spas at their central recreation facility that require year-round heating to serve the community. The HOA spends an average of $140,000 a year on electricity and $40,000 per year on natural gas. To reduce power and heating costs, the HOA considered alternative energy sources such as PV solar and thermal solar to power and heat it’s two Junior-Olympic pools (3,350 ft² each) and it’s Adult pool (2,200 ft²). However, the solar system was only projected to save approximately $12,500 per year (15+ year payback) and required additional reserves to be set aside to replace expensive inverters every 10 years and panels every 20 years.

PACE approached the Association with an alternative to use a small, 75 kW cogeneration module installed in the existing main pump room to provide both power and heat for the facilities. PACE provided a turn-key proposal which included engineering, permitting, procurement, installation of equipment and start-up of the system. The proposal originally projected an annual net cost savings (including fuel, maintenance, annual permitting and equipment replacement) of $45,000 per year based on the HOA’s historical natural gas rate. However, due to the installation of the cogeneration unit, PACE was also able to negotiate a new small commercial rate with the gas company which reduced the price of fuel by 50%. With the new rate in place, the HOA saved $7,000 in the two months prior to the cogen unit even going on-line!

Heating of the pools and electric generation are optimized by a customized control system provided by PACE which allows for automatic unattended operation of the cogen system. The control system continuously monitors and analyzes site power consumption and pool water temperatures so that power and heat are only generated when they can be consumed. The during “peak” demand periods, thereby minimizing connection which allows remote monitoring, control control system also monitors the electric utility loads so that “on peak” electric demand charges. The entire and data collection via an iPad or Windows PC. even in the absence of heat demand, the cogen unit can run control system was supplied with a secure internet Cogeneration Pool System Cogeneration Produces Heat and Power More Efficiently than Traditional Methods

Pelican Hill Resort Pools Newport Coast, California

PACE provided civil, mechanical and electrical engineering design for the Villa Recreation Center and Inn area pools and spas at the Pelican Hills Development. PACE designed the pools, which were all skimmer pools with a typical pool coping edge, in the Villas Recreation Center and Inn Area. The Inn Area swimming pools have a surge tank (rim flow pool edge). Additionally, PACE performed an evaluation of disinfection systems alternatives, including saltwater treatment.

VILLAS RECREATION CENTER: • Swimming Pool (4,700 sq. ft.) • Kids Pool (225 sq. ft.) • Spa (100 sq. ft.) • Mechanical Equipment Room below the pool deck

All above pools shall be skimmer pools with typical pool coping edge.

INN AREA POOLS: • 100-ft diameter rim flow swimming pool (7,854 sq. ft.) • Kids Pool (800 sq.ft.) • Spa #1 (80 sq.ft.) • Spa #2 (100 sq. ft.) • Mechanical Equipment Room (possibly below pool deck level).

The indoor spas at the inn area, which PACE was also contracted to design, includes: • Men’s Spa (120 sq. ft.) • Women’s Spa (120 sq. ft.) • (2) Mechanical Equipment Rooms (± 30 ft. from the spas located in the enclosed area)

Advanced Team Johan A. Perslow, PE Mark E. Krebs, PE Chairman President

Johan Perslow is a leading engineer in the water resources industry, businessman, and As President of PACE, Mark Krebs has the responsibility of managing day-to-day inventor. In 30 years, Mr. Perslow has started up and established three successful water operations of the company and as an engineering project manager. Mr. Krebs has resource companies - PACE, PERC, and Pacific Aquascape; each having annual revenues 25+ years of experience with a specialized background in stormwater management, exceeding $15 million. The engineering firm, PACE, is based on the premise of providing water supply, water treatment, river/wetland restoration and integrated infrastructure “Advanced Water Engineering” solutions, and has a reputation for delivering superior solutions systems. Mr. Krebs’ passion lies in developing smart water infrastructure, blending to complex challenges. Clients look to PACE and Mr. Perslow to develop and implement function, beauty and value. His engineering philosophy follows the company’s vision concepts which are extremely creative and valuable. Mr. Perslow has been the principal of developing solutions “in partnership with nature.” Water infrastructure solutions designer, consultant, and construction manager for more than 800 state-of-the-art water- designed by Mr. Krebs have been patented and recognized internationally as being resource projects including recycled water systems, natural-based stormwater management technically functional while adding significant value. and flood control systems, lake and pumping systems, irrigation-optimization systems, and tertiary water reclamation facilities. He has also been involved with the structural design of numerous interstate highway bridges and other complex structures such as a replacement design proposal for the World Trade Center in New York City. As PACE’s Senior Consultant, Principal, and Chairman of the Board, Mr. Perslow has been at the cutting edge of developing and applying new technology to solve unique water resource challenges. James Matthews, PE Andrew T. Komor, MS, PE Bruce M. Phillips, MS, PE Senior Vice President - Environmental Water Vice President - Environmental Water Senior Vice President - Stormwater Management

James Matthews is highly regarded in the water and Andrew Komor is a technical expert on water quality and Bruce Phillips has over 30 years of experience in wastewater community of the southwestern United States for engineering infrastructure having successfully performed stormwater management, river engineering, hydraulic his tremendous wealth of practical knowledge of the industry, engineering design, project management, and field services analysis and hydrology. He has been responsible and his ability to use technologies and research to develop for over $120 million in capital on over 20 completed water for analysis and design of numerous stormwater value for clients. Mr. Matthews has created designs of several resource projects in the past eight years. His expertise extends management, urban drainage systems and flood award-winning water reclamation facilities in California and into all aspects of water quality analysis, wetlands design and control facilities and has assisted in developing several Arizona, and has saved capital cost, reduced construction functionality, large pump stations, water treatment, wastewater drainage criteria manuals for multiple agencies. He has schedule, and minimized operations and maintenance needs recycling, and new industries including agricultural drainwater taught a variety courses in hydrology and hydraulics on hundreds of pump station, reservoir, water treatment, treatment, oil and gas flowback, and industrial wastewater. at CSU Long Beach and UCI for the civil engineering and wastewater treatment projects by implementing creative He is sought after as a technical expert for unique water departments for over 25 years. In addition, he has design concepts. His expertise stems from an extensive quality improvement challenges and has provided emergency taught hydraulic seminars for the PE exam review for background in construction supervision, plant operations, response services on a number of occasions on drinking and over 20 years and has published over 30 different papers and administration. Mr. Matthews has a proven record of recycled water supply issues. in stormwater management and river engineering. developing and ensuring completion of impressive solutions to dozens of clients most difficult problems. Often considered the most difficult aspect of any project’s completion, Mr. Matthews has personally installed custom control systems including PLC programming, SCADA, radio telemetry, and solid-state controls for their intended application. Sonny O. Sim, PE Ronald J. Rovansek, PhD, PE Vice President - Recreational Water Senior Consulting Engineer

Project Team Members

Sonny Sim has engineering and construction experience with PACE spanning back Ron Rovansek has a wide variety of civil and water resources engineering to 1996. From concept to final design and specifications, his project design and experience spanning back to 1990 including design, analysis, review, and technical construction experience includes manmade lake systems, pools/spas, interactive presentations. His experience includes analysis of stormwater impacts, design of water features, water rides, entry features, fountains and natural and manmade lake stormwater management systems and BMPs, stormwater master planning, river and restoration. He has specific water feature expertise in site grading, the mechanical creek engineering and restoration, and the design of lakes and lake communities. engineering design of pump stations, electronic controls, telemetry, advanced In addition, Dr. Rovansek has experience with pollution control technologies for chemical disinfection systems and pipeline hydraulics. Mr. Sim also imparts field combined sewers, non-point source pollution control, and the hydrology of both technical support and construction administration services for water feature design/ urban and undeveloped areas. Other experience includes researching stormwater build projects and water feature renovation projects. BMP design as a visiting scientist with USEPA. A dvanced W ater R esource S olutions ... in P artnership W ith N ature